It's quite easy to earn that amount from this forum alone. As many others have said signature campaigns are your best bet. You could even create a couple of accounts then sell them eventually. Hero accounts seem to go for 0.5 btc so if you had 2 you could make 1btc right there though I think it takes 1.5 years to get a Hero account.
I think the best way to earn that amount is signature campaign than sell the account, even though that's allowed but to create a couple account and have a plan to sell them of course have a big impact for this forum, as we know that there are so many spammers here especially in a few thread, everybody can create multiple account but please dont spam and if they want to post to get the activity why not to make at least one constructive post than posted only a line and an useless quote